1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab4707609de83ae6e8fc26b89506b0073243cf51a97fdacb544961eba4695cf. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2776f17-8073-450b-a562-4d8c3226ffbf.json and https://artists.proofprofile.net/proofs/artist/a2776f17-8073-450b-a562-4d8c3226ffbf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1364f77e9784b47bd21eaa962f4543e1af61211c677e36ef3c052686b80c7621. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNB2232041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c94843658c7571626a14f39fffab849abda5cea771df4fbc04b99a757dfe34. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAX2277612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b2715048281df68562bef5243d8c76feba1b3a8a2377b4be5cbea62e040774. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ62373296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685c149811fb13652427127d44f093d1f086da999b620727d30cd25c326d9220. Chain 2 (Bitcoin): anchored in block 957541 (2026-07-11T08:23:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ62373297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a79b9586187956dfe3bbfca908ab4598c7d53d037eef5bb21fa9210a317cea8. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:00:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ72394699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300181bb7749c57cfea8318883f5447bfb94cd6e403146310fe1fb8b3d84f309. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:56:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES62316784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a26321fd9e2c8e38879bff745b24d7a1d45d3563261dc443aa1f880190d06a3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES62316788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69ac5a39b4a0f418876edaa136bff4712cd023826456e9f88d8ff36fc81a1c8. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6N2392266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d017488bd7ca53e764a02a0f5248192129cb17fdc540e8de516c66ea410eac. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMER2334952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5677d83e68dff83605df7a33acb104c3b0a9d9131c04e2db40e67e81728b3933. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWY2380484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529fae9a985fc6bec85d3a3622f6e82e7d9a4225d0214eac28e2983ae7955451. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAT2392184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89db2daa61141697aa08073b77ec50c17d6ba46f2145289af75d3877852ef35. Chain 2 (Bitcoin): anchored in block 957540 (2026-07-11T08:19:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAY2353346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a777355e072b608a0515dfeda701192292bf1f3e16c01bf3acb388e6e7393b5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB82344808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb10d6409fb18dcb68990c10ad3a76d602fd99accef75065ba0f2a148c0a4a3f. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFE2344271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cc5d2196150c2117d98f7f1c1d6b4ea118778055dba5911eb7906efac4776b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFE2344272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb31e7393d80c1974ed591550e29bf9cf824308bcdf319a93e20cffb344236e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFG2326372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fb3dc8e0314573fd6bf74feb7126f323a3f6739aac129cf57f8d6875f005c2. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAW2491645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa6ab8fb34fec81a570839450b68f2d9bafecb7dbbc093e06dd91f1f85d43ca. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFJ2416164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98b37e55614c7be3cbae05337fbaa7d663e1b6029c48c1ebc7e2364e893c27c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7P2474476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87f0fc1aebcca47bd9b5b5cdb9ae6c67262edde2396814d2de01fabc9d407f1. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7P2474477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc803b3db2250a9f1ff4693037f3d3815b963386c98844bb5d9d298be1a518a8. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:59:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7P2474478.